EP2043779A1

EP2043779A1 - Method for producing an amine

Info

Publication number: EP2043779A1
Application number: EP07787039A
Authority: EP
Inventors: Petr Kubanek; Bram Willem Hoffer; Ekkehard Schwab; Johann-Peter Melder; Holger Evers; Till Gerlach
Original assignee: BASF SE
Current assignee: BASF SE
Priority date: 2006-07-14
Filing date: 2007-07-04
Publication date: 2009-04-08
Also published as: WO2008006748A1; US20090264652A1; RU2009104982A; JP2009543830A; CN101489673A

Abstract

The invention relates to a method for producing an amine by reacting a primary or secondary alcohol, aldehyde and/or ketone with hydrogen and a nitrogen compound, selected from the group comprising ammonia, primary and secondary amines, in the presence of a zirconium dioxide-containing catalyst and a nickel-containing catalyst. The catalytically active weight of the catalyst, prior to reduction with hydrogen, contains oxygen-containing compounds of zirconium, copper, nickel and cobalt and 0,5 to 6 wt.-% oxygen-containing compounds of silver, calculated as AgO.

Description

Process for the preparation of an amine

description

The present invention relates to zirconia and nickel containing catalysts and to a process for producing an amine by reacting a primary or secondary alcohol, aldehyde and / or ketone with hydrogen and a nitrogen compound selected from the group consisting of ammonia, primary and secondary amines in the presence of a zirconia and nickel-containing catalyst.

The process products find inter alia. Use as intermediates in the preparation of fuel additives (US-A-3,275,554, DE-A-21 25 039 and DE-A-36 11 230), surfactants, drugs and crop protection agents, hardeners for epoxy resins, catalysts for polyurethanes, intermediates for the preparation quaternary ammonium compounds, plasticizers, corrosion inhibitors, synthetic resins, ion exchangers, textile auxiliaries, dyes, vulcanization accelerators and / or emulsifiers.

No. 4,153,581 (Habermann) relates to the amination of alcohols, aldehydes or ketones by means of specific Co / Cu catalysts which contain Fe, Zn and / or Zr.

US 4,152,353 (Dow) relates to the amination of alcohols, aldehydes or ketones by means of specific Ni / Cu catalysts containing Fe, Zn and / or Zr.

EP-A1-382 049 (BASF AG) discloses catalysts comprising oxygen-containing zirconium, copper, cobalt and nickel compounds and processes for the hydrogenating amination of alcohols. The preferred zirconium oxide content of these catalysts is from 70 to 80% by weight (loc.cit: page 2, last paragraph, page 3, 3rd paragraph, examples). Although these catalysts are characterized by a good activity and selectivity, but show improvement in service life.

EP-A2-514 692 (BASF AG) discloses copper, nickel and / or cobalt, zirconium and / or alumina-containing catalysts for the catalytic amination of alcohols in the gas phase with ammonia or primary amines and hydrogen. This patent application teaches that in these catalysts, the atomic ratio of nickel to copper must be 0.1 to 1, 0, preferably 0.2 to 0.5 (see loc. Cit .: Example 1), otherwise in the amination of Alcohols to an increased extent yield-reducing by-products occur (loc cit .: Examples 6 and 12). The carrier used is preferably alumina (loc.cit .: Examples 1 to 5 and 7 to 11).

From EP-A1-696 572 and EP-A-697 395 (both BASF AG) nickel, copper, zirconium oxide and molybdenum oxide-containing catalysts for the catalytic amination of alcohols with nitrogen compounds and hydrogen are known. With these Catalysts are indeed achieved high sales, but it can form by-products that interfere with themselves or their derivatives in the workup.

EP-A2-905 122 (BASF AG) describes a process for the preparation of amines from alcohols and nitrogen compounds using a catalyst whose catalytically active composition contains oxygen-containing compounds of zirconium, copper and nickel and no oxygen-containing compounds of cobalt or molybdenum.

EP-A-1 035 106 (BASF AG) relates to the use of catalysts comprising oxygen-containing compounds of zirconium, copper and nickel for the preparation of amines by aminative hydrogenation of aldehydes or ketones.

EP-A1-963 975 and EP-A2-1 106 600 (both BASF AG) describe processes for the preparation of amines from alcohols or aldehydes or ketones and nitrogen compounds using a catalyst whose catalytically active composition is 22-40% by weight. (or 22-45 wt .-%) oxygen-containing compounds of zirconium, 1-30 wt .-% oxygen-containing compounds of copper and each 15-50 wt .-% (or 5-50 wt .-%) of oxygen-containing compounds of the Contains nickel and cobalt. WO-A-03/076386 and EP-A1-1 431 271 (both BASF AG) teach catalysts of the above-mentioned. Type for aminations.

WO-A1-03 / 051508 (Huntsman Petrochemical Corp.) relates to processes for the amination of alcohols using specific Cu / Ni / Zr / Sn-containing catalysts which in another embodiment contain Cr instead of Zr (see page 4, Lines 10-16).

European Patent Application No. 06101339.7 of 06.02.06 (BASF AG) describes a process for the preparation of aminodiglycol (ADG) and morpholine by reaction of diethylene glycol (DEG) with ammonia in the presence of a transition metal heterogeneous catalyst, wherein the catalytically active material of the catalyst before the treatment with hydrogen containing oxygen-containing compounds of aluminum and / or zirconium, copper, nickel and cobalt and the shaped catalyst body has specific dimensions.

Four parallel European patent applications with the same filing date (all BASF AG) relate to certain doped, zirconia, copper and nickel containing catalysts and their use in processes for preparing an amine by reacting a primary or secondary alcohol, aldehyde and / or ketone with hydrogen and ammonia , a primary or secondary amine. When using the very active catalysts of the prior art, in particular also the catalysts according to EP-A1-696 572, EP-A1-963 975 and EP-A2-1 106 600 (see above), it is possible for the educts (alcohols, aldehyde, Ketone) at elevated temperature increased to the decarbonylation of (optionally intermediate formed) carbonyl function come. The formation of methane by hydrogenation of carbon monoxide (CO) leads due to the large released heat of hydrogenation to a 'Durchfahrgege', ie an uncontrolled increase in temperature in the reactor. When CO is trapped by amines, the formation of methyl group-containing secondary components occurs.

In the amination of diethylene glycol (DEG), for example, there is an increased formation of undesirable methoxyethanol or methoxyethylamine.

In the example of the amination of diethylene glycol (DEG), the "decarbonylation" is considered in particular as the sum of undesired components (methanol, methoxyethanol, methoxyethylamine, N-methylmorpholine and methoxy-ethyl-morpholine), which according to the reaction network from DEG via methoxyethanol arise:

DEG SVtoφhoϊϊn

+ H2

^. CH ₃ OH methanol

HO

Methoxyethanol N / \ / + CO

CH ₄ methane

+ NH3

Methoxy-ethyl morphine

As a reaction mechanism of the amination of primary or secondary alcohols, it is believed that the alcohol is first dehydrated at a metal center to the corresponding aldehyde. In this case, copper probably has special significance as a dehydrogenating component. If aldehydes are used for the amination, this step is omitted.

The aldehyde formed or used can be prepared by reaction with ammonia or primary or secondary amine with elimination of water and subsequent hydrogenation. be aminated. This condensation of the aldehyde with the above-mentioned nitrogen compound is presumably catalyzed by acidic centers of the catalyst. In an undesired secondary reaction, however, the aldehyde can also be decarbonylated, ie the aldehyde function is split off as CO. Decarbonylation or methanation presumably occurs at a metallic center. The CO is hydrogenated to methane on the hydrogenation catalyst so that methane formation indicates the extent of decarbonylation. Decarbonylation results in the abovementioned undesired by-products, for example methoxyethanol and / or methoxyethylamine in the abovementioned case.

The desired condensation of the aldehyde with ammonia or primary or secondary amine and the undesirable decarbonylation of the aldehyde are parallel reactions of which the desired condensation is believed to be acid-catalyzed, while the undesirable decarbonylation is catalyzed by metallic centers.

It is an object of the present invention to improve the economics of previous processes for the hydrogenating amination of aldehydes or ketones and of the amination of alcohols and a disadvantage or several disadvantages of the prior art, in particular the above-mentioned. Disadvantages to remedy. It should be found catalysts that are technically easy to prepare and that allow the o.g. Aminations with high conversion, high yield, space-time yields (RZA), selectivity, catalyst life at the same time high mechanical stability of the catalyst molding and lower .durchgeschgefahr ', perform. Accordingly, the catalysts should have high activity and high chemical and mechanical stability under the reaction conditions.

[Space-time yields are given in .product quantity / (catalyst volume • time) '(kg / (l kat • h)) and / or .product quantity / (reactor volume • time)' (kg / (lR _ea ctor • h)] ,

Accordingly, a process for producing an amine by reacting a primary or secondary alcohol, aldehyde and / or ketone with hydrogen and a nitrogen compound selected from the group consisting of ammonia, primary and secondary amines in the presence of a zirconia and nickel containing catalyst has been found characterized in that the catalytically active material of the catalyst prior to its reduction with hydrogen contains oxygen-containing compounds of zirconium, copper, nickel and cobalt and in the range of 0.5 to 6 wt .-% oxygen-containing compounds of silver, calculated as AgO. In addition, catalysts have been found containing oxygen-containing compounds of zirconium, copper, nickel and cobalt and in the range of 0.5 to 6 wt.% Of oxygen-containing compounds of silver, calculated as AgO.

In particular, catalysts whose catalytically active material before their reduction with hydrogen in the range of

10 to 75% by weight of oxygen-containing compounds of zirconium, calculated as ZrO2, 1 to 30% by weight of oxygen-containing compounds of copper, calculated as CuO, 10 to 50% by weight of oxygen-containing compounds of nickel, calculated as NiO, and 10 to 50 wt .-% oxygen-containing compounds of cobalt, calculated as CoO, and 0.5 to 6 wt .-% oxygen-containing compounds of silver, calculated as AgO, and their use in the above Amination process, especially in the process for the reaction of DEG with ammonia found.

According to the invention, it has been found that the activity of the catalyst for the amination of primary or secondary alcohols, aldehydes and / or ketones in the presence of H2, e.g. the amination of diethylene glycol (DEG) with ammonia to aminodiglycol and morpholine, by the additional content of zirconium-copper-nickel-cobalt catalysts on Ag, remains substantially the same, but at the same time decreases the extent of unwanted decarbonylation reaction and thus the selectivity of Amination reaction increases.

The process can be carried out continuously or discontinuously. Preferred is a continuous driving style.

For the synthesis in the gas phase, the starting materials are targeted, preferably in a circulating gas stream, vaporized and fed to the reactor in gaseous form. Suitable amines for a gas-phase synthesis are amines, which can be kept in the gas phase within the process parameters due to their boiling points and the boiling points of their educts. The recycle gas serves to evaporate the reactants and to react as reactants for the amination.

In the cycle gas method, the starting materials (alcohol, aldehyde and / or ketone, hydrogen and the nitrogen compound) are evaporated in a circulating gas stream and fed to the reactor in gaseous form.

The educts (alcohol, aldehyde and / or ketone, the nitrogen compound) can also be evaporated as aqueous solutions and passed with the circulating gas stream on the catalyst bed. Preferred reactors are tubular reactors. Examples of suitable reactors with recycle gas stream can be found in Ullmann's Encyclopedia of Industrial Chemistry, 5th Ed., Vol. B 4, pages 199-238, "Fixed-Bed Reactors".

Alternatively, the reaction is advantageously carried out in a tube bundle reactor or in a monostane system.

In a mono-feed plant, the tubular reactor in which the reaction takes place can consist of a series connection of several (for example two or three) individual tubular reactors. Optionally, an intermediate feed of feed (containing the educt and / or ammonia and / or H2) and / or circulating gas and / or reactor discharge from a downstream reactor is advantageously possible here.

The circulating gas quantity is preferably in the range from 40 to 1500 m ³ (at operating pressure) / [m ³ catalyst (bulk volume) • h], in particular in the range from 100 to 700 m ³ (at operating pressure) / [m ³ catalyst (bulk volume). H].

The cycle gas preferably contains at least 10, especially 50 to 100, especially 80 to 100, vol.% H ₂ .

For the synthesis in the liquid phase, all starting materials and products are suitable, which are difficult to evaporate or thermally labile. In these cases, another advantage is that this can be dispensed with evaporation and recondensation of the amine in the process.

In the process according to the invention, the catalysts are preferably used in the form of catalysts which consist only of catalytically active material and optionally a molding aid (such as graphite or stearic acid), if the catalyst is used as a shaped body, ie no further catalytically active impurities contain.

In this context, the oxidic carrier material zirconium dioxide (ZrO ₂ ) is considered as belonging to the catalytically active material.

The catalysts are used in such a way that one introduces the catalytically active, ground to powder mass in the reaction vessel or, that the catalytically active material after grinding, mixing with molding aids, shaping and heat treatment as shaped catalyst body - for example as tablets, spheres, rings, extrudates (eg strands) - arranges in the reactor.

The concentration data (in% by weight) of the components of the catalyst in each case relate to the catalytically active composition of the catalyst, unless stated otherwise finished catalyst after the last heat treatment and before its reduction with hydrogen.

The catalytically active mass of the catalyst, after its last heat treatment and before its reduction with hydrogen, is the sum of the masses of the catalytically active constituents and the o. G. Catalyst support materials defined and contains essentially the following components:

Zirconia (ZrO 2), oxygenated compounds of copper, nickel and cobalt, and oxygenated compounds of silver.

The sum of o. G. Components of the catalytically active composition are usually from 70 to 100% by weight, preferably from 80 to 100% by weight, particularly preferably from 90 to 100% by weight, especially> 95% by weight, very particularly> 98% by weight , in particular> 99 wt .-%, for example particularly preferably 100% by weight.

The catalytically active composition of the catalysts used according to the invention and used in the process according to the invention may further contain one or more elements (Oxidati- onsstufe 0) or their inorganic or organic compounds selected from the groups IA to VI A and IB to VII B and VIII of the Periodic Table ,

Examples of such elements or their compounds are:

Transition metals, such as Re or rhenium oxides, Mn or MnÜ2, W or tungsten oxides, Ta or tantalum oxides, Nb or niobium oxides or niobium oxalate, V or vanadium oxides or vanadyl pyrophosphate; Lanthanides, such as Ce or CeO 2 or Pr or P ^ Ch; Alkali metal oxides, such as Na2Ü; Alkali metal carbonates such as Na 2 CO 3; Alkaline earth metal oxides, such as SrO; Alkaline earth metal carbonates such as MgCθ3, CaCO3 and BaCOa; Boron oxide (B2O3). The catalytically active composition of the catalysts according to the invention and used in the process according to the invention preferably contains no ruthenium, no iron and / or no zinc.

The catalytically active composition of the catalyst before its reduction with hydrogen preferably in the range of 1, 0 to 4 wt .-%, especially in the range of 1, 3 to 3 wt .-%, more particularly in the range of 1, 5 to 2 , 5 wt .-%, oxygenated compounds of silver, calculated as AgO.

The catalytically active composition of the catalyst before its reduction with hydrogen further preferably in the range of

10 to 75 wt .-%, particularly 25 to 65 wt .-%, more particularly 30 to 55 wt .-%, oxygen-containing compounds of zirconium, calculated as Zrθ2, 1 to 30 wt .-%, especially 2 to 25 wt. %, more particularly 5 to 15% by weight, of oxygen-containing compounds of copper, calculated as CuO, from 10 to 50% by weight, especially from 13 to 40% by weight, more particularly from 16 to 35% by weight, oxygen-containing compounds of nickel, calculated as NiO, and

10 to 50 wt .-%, particularly 13 to 40 wt .-%, more particularly 16 to 35 wt .-%, oxygen-containing compounds of cobalt, calculated as CoO.

The molar ratio of nickel to copper is preferably greater than 1, more preferably greater than 1.2, more preferably in the range of 1.8 to 8.5.

Various processes are possible for the preparation of the catalysts used in the process according to the invention. They are obtainable, for example, by peptizing powdery mixtures of the hydroxides, carbonates, oxides and / or other salts of the components with water and then extruding and annealing (heat treating) the mass thus obtained.

Preference is given to using precipitation methods for the preparation of the catalysts according to the invention. For example, they may be precipitated together by co-precipitation of the nickel, cobalt and copper and doping metal components from an aqueous salt solution containing these elements by means of bases in the presence of a slurry of a sparingly soluble, oxygen-containing zirconium compound followed by washing, drying and calcination of the resulting precipitate to be obtained. Zirconium dioxide, zirconium oxide hydrate, zirconium phosphates, borates and silicates can be used, for example, as sparingly soluble, oxygen-containing zirconium compounds. The slurries of the sparingly soluble zirconium compounds can be prepared by suspending fine-grained powders of these compounds in water with vigorous stirring. Advantageously, these slurries are obtained by precipitating the sparingly soluble zirconium compounds from aqueous zirconium salt solutions by means of bases.

The catalysts according to the invention are preferably prepared by a co-precipitation (mixed precipitation) of all their components. For this purpose, it is expediently mixed with an aqueous salt solution containing the catalyst components while heating and while stirring with an aqueous base, for example sodium carbonate, sodium hydroxide, potassium carbonate or potassium hydroxide, until the precipitation is complete. It is also possible to use alkali metal-free bases such as ammonia, ammonium carbonate, ammonium bicarbonate, ammonium carbamate, ammonium oxalate, ammonium malonate, urotropin, urea, etc. The nature of the salts used is generally not critical: since it depends primarily on the water solubility of the salts in this approach, one criterion is their good water solubility required for the preparation of these relatively highly concentrated salt solutions. It is taken for granted that when selecting the salts of the individual components, of course, only salts with such anions are chosen which do not lead to disturbances, either by causing undesired precipitation or by complicating or preventing precipitation by complex formation. The precipitates obtained in these precipitation reactions are generally chemically nonuniform and consist, inter alia, of mixtures of the oxides, oxide hydrates, hydroxides, carbonates and insoluble and basic salts of the metals used. It may prove beneficial for the filterability of the precipitates when they are aged, that is, when they leave themselves for some time after precipitation, optionally in heat or by passing air through it.

The precipitates obtained by these precipitation processes are further processed to the inventive catalysts as usual. First, the precipitation is washed. Over the duration of the washing process and on the temperature and amount of wash water, the content of alkali metal, which was supplied by the (mineral) base possibly used as precipitant, can be influenced. In general, by extending the washing time or increasing the temperature of the washing water, the content of alkali metal will decrease. After washing, the material to be precipitated is generally dried at 80 to 200 ° C, preferably at 100 to 150 ° C, and then calcined. The calcination is carried out generally at temperatures between 300 and 800 ° C, preferably at 400 to 600 ° C, in particular at 450 to 550 ° C.

The catalysts according to the invention can also be prepared by impregnation of zirconium dioxide (ZrO.sub.2) which is present, for example, in the form of powders or shaped articles, such as extrudates, tablets, spheres or rings.

The zirconia is used, for example, in the monoclinic or tetragonal form, preferably in the monoclinic form.

The production of moldings can be carried out by the usual methods.

The impregnation is also carried out by the usual methods, such as. B. A. Stiles, Catalyst Manufacture Laboratory and Commercial Preparations, Marcel Dekker, New York (1983), by applying a respective metal salt solution in one or more impregnation stages, wherein as metal salts z. B. corresponding nitrates, acetates or chlorides can be used. The mass is dried after the impregnation and optionally calcined.

The impregnation can be carried out according to the so-called "incipient wetness" method, in which the zirconium dioxide is moistened according to its water absorption capacity to a maximum of saturation with the impregnation solution. The impregnation can also be done in supernatant solution. In the case of multi-stage impregnation processes, it is expedient to dry between individual impregnation steps and optionally to calcine. The multi-stage impregnation is advantageous to apply especially when the zirconium dioxide is to be applied with a larger amount of metal.

For application of the metal components to the zirconia, the impregnation can take place simultaneously with all metal salts or in any order of the individual metal salts in succession.

Subsequently, the catalysts prepared by impregnation are dried and preferably also calcined, e.g. at the calcining temperature ranges already indicated above.

After calcination, the catalyst is suitably conditioned, whether it is adjusted by grinding to a certain particle size or that it is mixed after its grinding with molding aids such as graphite or stearic acid, by means of a press to formations, for. As tablets, pressed and tempered. The tempering temperatures preferably correspond to the temperatures during the calcination.

The catalysts prepared in this way contain the catalytically active metals in the form of a mixture of their oxygen-containing compounds, i. especially as oxides and mixed oxides.

The e.g. Catalysts prepared as described above are stored as such and optionally traded. Before being used as catalysts, they are usually prereduced. However, they can also be used without prereduction, in which case they are reduced under the conditions of the hydrogenating amination by the hydrogen present in the reactor.

For prereduction, the catalysts are first heated at preferably 150 to 200 ° C for a period of e.g. 12 to 20 hours exposed to a nitrogen-hydrogen atmosphere and then treated for up to about 24 hours at preferably 200 to 400 ° C in a hydrogen atmosphere. In this pre-reduction, a portion of the oxygen-containing metal compounds present in the catalysts is reduced to the corresponding metals, so that they are present together with the various oxygen compounds in the active form of the catalyst.

A further advantage of the catalysts according to the invention is their mechanical stability, ie their hardness. The mechanical stability can be determined by measuring the so-called lateral compressive strength. For this purpose, the shaped catalyst body, for. B. the catalyst tablet, between two parallel plates loaded with increasing force, wherein this load z. B. can take place on the shell side of catalyst tablets until a breakage of the catalyst molding occurs. The force registered on breakage of the shaped catalyst body is the lateral compressive strength.

The inventive method is preferably carried out continuously, wherein the catalyst is preferably arranged as a fixed bed in the reactor. Both an inflow of the fixed catalyst bed from above and from below is possible. The gas flow is adjusted by temperature, pressure and amount so that even higher-boiling (high-boiling) reaction products remain in the gas phase.

The aminating agent can be used in stoichiometric, under- or stoichiometric amounts with regard to the alcoholic hydroxyl group or aldehyde group or keto group to be aminated.

In the case of the amination of alcohols, aldehydes or ketones with primary or secondary amines, the amine is preferably used in an approximately stoichiometric amount or slightly more than stoichiometric amount per mole of alcoholic hydroxyl group, aldehyde group or keto group to be aminated.

The amine component (nitrogen compound) is preferably in the 0.90 to 100-fold molar amount, in particular in the 1, 0 to 10-fold molar amount, in each case based on the / used alcohol, aldehyde and / or ketone used.

In particular, ammonia is generally used with a 1.5 to 250-fold, preferably 2 to 100-fold, in particular 2 to 10-fold, molar excess per mole of alcoholic hydroxyl group, aldehyde group or keto group to be reacted. Higher excesses of both ammonia and primary or secondary amines are possible.

Preferably, an amount of exhaust gas from 5 to 800 standard cubic meters / h, in particular 20 to 300 standard cubic meters / h, driven.

The amination of the primary or secondary alcohol groups, aldehyde groups or keto groups of the educt can be carried out in the liquid phase or in the gas phase. Preferably, the fixed bed process is in the gas phase.

When working in the liquid phase, the starting materials (alcohol, aldehyde or ketone plus ammonia or amine) are passed simultaneously in the liquid phase at pressures of generally from 5 to 30 MPa (50 to 300 bar), preferably from 5 to 25 MPa, more preferably from 15 to 25 MPa, and temperatures of generally 80 to 350 ° C, especially 100 to 300 ° C, preferably 120 to 270 ° C, more preferably 130 to 250 ° C, in particular 170 to 230 ° C, including hydrogen over the catalyst, the usually in a preferred externally heated fixed bed reactor is located. It is both a trickle way and a sumping possible. The catalyst loading is generally in the range of 0.05 to 5, preferably 0.1 to 2, more preferably 0.2 to 0.6, kg of alcohol, aldehyde or ketone per liter of catalyst (bulk volume) and hour. Optionally, dilution of the starting materials with a suitable solvent, such as tetrahydrofuran, dioxane, N-methylpyrrolidone or ethylene glycol dimethyl ether, take place. It is expedient to heat the reactants before they are introduced into the reaction vessel, preferably to the reaction temperature.

When working in the gas phase, the gaseous educts (alcohol, aldehyde or ketone plus ammonia or amine) in a gas stream chosen for evaporation sufficiently large, preferably hydrogen, at pressures of generally 0.1 to 40 MPa (1 to 400 bar), preferably 0.1 to 10 MPa, more preferably 0.1 to 5 MPa, in the presence of hydrogen passed over the catalyst. The temperatures for the amination of alcohols are generally 80 to 350 ° C, especially 100 to 300 ° C, preferably 120 to 270 ° C, particularly preferably 160 to 250 ° C. The reaction temperatures in the hydrogenating amination of aldehydes and ketones are generally 80 to 350 ° C, especially 90 to 300 ° C, preferably 100 to 250 ° C. It is both an influx of the fixed catalyst bed from above and from below possible. The required gas stream is preferably obtained by a cycle gas method.

The catalyst loading is generally in the range of 0.01 to 2, preferably 0.05 to 0.5, kg of alcohol, aldehyde or ketone per liter of catalyst (bulk volume) and hour.

The hydrogen is generally fed to the reaction in an amount of from 5 to 400 l, preferably in an amount of from 50 to 200 l per mole of alcohol, aldehyde or ketone component, the liter data in each case being converted to standard conditions (ST .). The amination of aldehydes or ketones differs in the implementation of the amination of alcohols in that in the amination of aldehydes and ketones at least stoichiometric amounts of hydrogen must be present.

Both when working in the liquid phase and when working in the gas phase, the use of higher temperatures and higher total pressures and catalyst loads is possible. The pressure in the reaction vessel, which results from the sum of the partial pressures of the aminating agent, of the alcohol, aldehyde or ketone and the reaction products formed and optionally of the solvent used at the indicated temperatures, is expediently increased by pressurizing hydrogen to the desired reaction pressure. Both in liquid phase continuous operation and in gas phase continuous operation, the excess aminating agent can be recycled along with the hydrogen.

If the catalyst is arranged as a fixed bed, it may be advantageous for the selectivity of the reaction to mix the catalyst form body in the reactor with inert fillers, so to speak to "dilute" them. The proportion of fillers in such catalyst preparations may be 20 to 80, especially 30 to 60 and especially 40 to 50 parts by volume.

The reaction water formed in the course of the reaction (in each case one mole per mole of reacted alcohol group, aldehyde group or keto group) generally does not interfere with the degree of conversion, the reaction rate, the selectivity and the catalyst life and is therefore expediently only in the workup of the reaction product removed from this, z. B. distillative.

From the reaction effluent, after it has been expediently expanded, the excess hydrogen and the excess amination agent optionally present are removed and the reaction crude product obtained is purified, e.g. by a fractional rectification. Suitable work-up procedures are e.g. in EP-A-1 312 600 and EP-A-1 312 599 (both BASF AG). The excess aminating agent and the hydrogen are advantageously returned to the reaction zone. The same applies to the possibly not completely reacted alcohol, aldehyde or ketone component.

Unreacted starting materials and any appropriate by-products can be recycled back into the synthesis. Unreacted starting materials can be re-flowed over the catalyst bed in discontinuous or continuous operation after condensation of the products in the separator in the circulating gas stream.

Amination agents in the process according to the invention are, in addition to ammonia, primary and secondary amines.

By the process according to the invention, it is possible to produce e.g. Amines of the formula I

R ³

^R V _{/ N} - _fi I - R4

(D, in the

R ^1, R ² is hydrogen (H), alkyl, such as Ci _-2 o alkyl, cycloalkyl, such as C _3-12 cycloalkyl, alkoxyalkyl, such as C2-3o alkoxyalkyl, dialkyl laminoalkyl as C3-3o-dialkylaminoalkyl, aryl, aralkyl, such as C7-2o aralkyl, and alkylaryl, such as C7-2o-alkylaryl, or together are - _(CH2) Jx (CH ₂₎ k,

R ^3, R ⁴ is hydrogen (H), alkyl, such as C ₂ o-alkyl, cycloalkyl such as C ₃ -

12 cycloalkyl, hydroxyalkyl, such as Ci-20 hydroxyalkyl, aminoalkyl, such as Ci-20 aminoalkyl, hydroxyalkylaminoalkyl, hydroxyalkylaminoalkyl such as C _2-2 O-, alkoxyalkyl, such as C ₂ - ₃₀ - alkoxyalkyl, dialkylaminoalkyl, such as C3- 3o-dialkylaminoalkyl, alkylaminoalkyl, such as C ₂ -3o-alkylaminoalkyl, R ⁵ -

(OCR ⁶ R ⁷ CR ⁸ RV (OCR ⁶ R ^7), aryl, heteroaryl, aralkyl, such as C7-2o aralkyl, heteroarylalkyl, such as _C4-2-o heteroarylalkyl, alkylaryl, such as C7-2o-alkylaryl, alkylheteroaryl, such as C 4-20 -alkyl heteroaryl, and Y- (CH ₂ ) m -NR ⁵ - (CH ₂ ) q or together - (CH ₂ ) 1 -X- (CH ₂ ) m- or

R ² and R ⁴ together - (CH ₂ ) ι-X- (CH ₂ ) _m -,

R ^5, R ¹⁰ is hydrogen (H), alkyl, such as Ci _-4 alkyl, alkylphenyl, such as C ₇ - 4o-alkylphenyl,

R ⁶ , R ⁷ , R ⁸ , R ^{9 is} hydrogen (H), methyl or ethyl,

X is CH ₂ , CHR ⁵ , oxygen (O), sulfur (S) or NR ⁵ ,

YN (R ¹⁰ ) ₂ , hydroxy, C _2-20 -alkylaminoalkyl or C _3-20 -

dialkylaminoalkyl,

n is an integer from 1 to 30 and

j, k, I, m, q is an integer from 1 to 4,

mean.

The process according to the invention is therefore preferably used for the preparation of an amine I application by reacting a primary or secondary alcohol of the formula II

R ³

HO-C-R4

^H (H)

and / or aldehyde and / or ketone of the formula VI or VII

with a nitrogen compound of the formula III

N-H /

^R2 (Wed),

where R ¹ , R ² , R ³ and R ^{4 have} the abovementioned meanings, is reacted.

The starting alcohol may also be an aminoalcohol, e.g. an aminoalcohol according to the formula II.

As can be seen from the definitions for the radicals R ² and R ⁴ , the reaction can also be carried out intramolecularly in a corresponding amino alcohol, aminoketone or amino aldehyde.

For the preparation of the amine I is therefore formally replaced by a hydrogen atom of the nitrogen compound III by the radical R ⁴ (R ³ ) CH- with the release of one molar equivalent of water.

The process according to the invention is also preferably used in the preparation of a cyclic amine of the formula IV

in the

R ¹¹ and R ¹² is hydrogen (H), alkyl, such as C ₂ to C o alkyl, cycloalkyl such as C ₃ - to C ₂ - cycloalkyl, aryl, heteroaryl, aralkyl such as Cz to C2o aralkyl, and Alkyla - Ryl, such as C7 to C20 alkylaryl,

Z is CH ₂ , CHR ⁵ , oxygen (O), NR ⁵ or NCH ₂ CH ₂ OH and

R ¹ , R ⁶ , R ^{7 have} the meanings given above,

by reacting an alcohol of the formula V

with ammonia or a primary amine of formula VI

R ¹ - NH, (VI).

The substituents R ¹ to R ¹² , the variables X, Y, Z and the indices j, k, I, m, n and q in the compounds I, II, IM, IV, V, VI and VII have the following meanings independently :

R ¹ , R ² , R ³ , R ⁴ , R ⁵ , R ⁶ , R ⁷ , R ⁸ , R ⁹ , R ¹⁰ , R ¹¹ , R ¹² : hydrogen (H),

R ³ , R ⁴ :

Alkyl, such as Ci-20-alkyl, preferably Ci-14-alkyl, such as methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, sec-butyl, tert-butyl, n-pentyl iso-pentyl, sec-pentyl, neo-pentyl, 1, 2-dimethylpropyl, n-hexyl, iso-hexyl, sec-hexyl, cyclopentylmethyl, n-heptyl, iso-heptyl, cyclohexylmethyl, n-octyl, iso Octyl, 2-ethylhexyl, n-decyl, 2-n-propyl-n-heptyl, n-tridecyl, 2-n-butyl-n-nonyl and 3-n-

Butyl-n-nonyl,

Hydroxyalkyl, such as Ci-20-hydroxyalkyl, preferably Ci-8-hydroxyalkyl, particularly preferably Ci-4-hydroxyalkyl, such as hydroxymethyl, 1-hydroxyethyl, 2-hydroxyethyl, 1-hydroxy-n-propyl, 2-hydroxy-n-propyl , 3-hydroxy-n-propyl and 1- (hydroxymethyl) ethyl,

Aminoalkyl, such as C 1-20 -aminoalkyl, preferably C 1-8 -aliminoalkyl, such as aminomethyl, 2-aminoethyl, 2-amino-1, 1-dimethylethyl, 2-amino-n-propyl, 3-amino-n-propyl, 4 Amino-n-butyl, 5-amino-n-pentyl, N- (2-aminoethyl) -2-aminoethyl and N- (2-aminoethyl) aminomethyl,

Hydroxyalkylaminoalkyl, such as C2-2o-hydroxyalkylaminoalkyl, preferably C3-8-hydroxyalkylaminoalkyl, such as (2-hydroxyethylamino) methyl, 2- (2-hydroxyethylamino) ethyl and 3- (2-hydroxyethylamino) propyl,

R ⁵ - (OCR ⁶ R ⁷ CR ⁸ R ⁹ ) _n - (OCR ⁶ R ⁷ ), preferably R ⁵ - (OCHR ⁷ CHR ⁹ ) _n - (OCR ⁶ R ⁷ ), more preferably R ⁵ - (OCH ₂ CHR ⁹ ) _n - (OCR ⁶ R ⁷ ), Alkylaminoalkyl, such as C 2-3 -alkylaminoalkyl, preferably C 2-30 -alkylaminoalkyl, particularly preferably C 2-8 -alkylaminoalkyl, such as methylaminomethyl, 2-methylaminoethyl, ethylaminomethyl, 2-ethylaminoethyl and 2- (isopropylamino) ethyl, (R ⁵ ) HN- (CH ₂ ) _q ,

Heteroarylalkyl, such as C4-2o-heteroarylalkyl, such as pyrid-2-ylmethyl, furan-2-ylmethyl, pyrrol-3-ylmethyl and imidazol-2-ylmethyl,

Alkyl heteroaryl, such as C 4-2o-alkyl heteroaryl, such as 2-methyl-3-pyridinyl, 4,5-dimethylimidazol-2-yl, 3-methyl-2-furanyl and 5-methyl-2-pyrazinyl,

Heteroaryl, such as 2-pyridinyl, 3-pyridinyl, 4-pyridinyl, pyrazinyl, pyrrol-3-yl, imidazol-2-yl, 2-furanyl and 3-furanyl,

R ¹ , R ² , R ³ , R ⁴ :

Cycloalkyl, such as C 3-12 -cycloalkyl, preferably C 3-8 -cycloalkyl, such as cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl and cyclooctyl, particularly preferably cyclopentyl and cyclohexyl,

Alkoxyalkyl, such as C 2-3 -alkoxyalkyl, preferably C 2-30 -alkoxyalkyl, particularly preferably C 2-8 -alkoxyalkyl, such as methoxymethyl, ethoxymethyl, n-propoxymethyl, isopropoxymethyl, n-butoxymethyl, isobutoxymethyl, sec-butoxymethyl, tert-butoxymethyl, 1-methoxyethyl and 2-methoxyethyl, particularly preferably C 2-4

alkoxyalkyl,

Dialkylaminoalkyl, such as C3-3o-dialkylaminoalkyl, preferably C3-2o-dialkylaminoalkyl, more preferably C3-io-dialkylaminoalkyl, such as N, N-dimethylaminomethyl, (N, N-dibutylamino) methyl, 2- (N, N-dimethylamino) ethyl , 2- (N, N-Diethylamino) ethyl, 2- (N, N-dibutylamino) ethyl, 2- (N, N-di-n-propylamino) ethyl and 2- (N, N-diiso -propylamino) ethyl, 3- (N, N-dimethylamino) propyl, (R ⁵ ) ₂ N- (CH ₂ ) _q ,

Aryl, such as phenyl, 1-naphthyl, 2-naphthyl, 1-anthryl, 2-anthryl and 9-anthryl, preferably phenyl, 1-naphthyl and 2-naphthyl, more preferably phenyl,

Alkylaryl, such as C7-2o-alkylaryl, preferably C7-12-alkylphenyl, such as 2-methylphenyl, 3-methylphenyl, 4-methylphenyl, 2,4-dimethylphenyl, 2,5-dimethylphenyl, 2,6-dimethylphenyl, 3,4 Dimethylphenyl, 3,5-dimethylphenyl, 2,3,4-trimethylphenyl, 2,3,5-trimethylphenyl, 2,3,6-trimethylphenyl, 2,4,6-trimethylphenyl,

2-ethylphenyl, 3-ethylphenyl, 4-ethylphenyl, 2-n-propylphenyl, 3-n-propylphenyl and 4-n-propylphenyl, Aralkyl, such as C7-2o-aralkyl, preferably C7-12-phenylalkyl, such as benzyl, p-methoxybenzyl, 3,4-dimethoxybenzyl, 1-phenethyl, 2-phenethyl, 1-phenyl-propyl, 2-phenylpropyl, 3 -Phenyl-propyl, 1-phenyl-butyl, 2-phenyl-butyl, 3-phenyl-butyl and 4-phenyl-butyl, more preferably benzyl, 1-phenethyl and 2-phenethyl,

R ³ and R ⁴ or R ² and R ⁴ together form a - (CH ₂ ) 1 -X- (CH ₂ ) _m group, such as - (CH ₂ J ₃ -, - (CH ₂ J ₄ -, - (CH ₂ ) S-, - (CH ₂ J ₆ -, - (CH ₂ J ₇ -, - (CH ₂ JO- (CH ₂ J ₂ -, - (CH ₂ J-NR ⁵ - (CH ₂ J ₂ -, - ( CH ₂ J-CHR ^S - (CH ₂ J ₂ -, - (CH ₂ J ₂ -O- (CH ₂ J ₂ -, - (CH ₂ ) ₂ -NR ⁵ - (CH ₂ ) ₂ -, - (CH ₂ J ₂ - CHRs- (CH ₂ J ₂ -, -CH ₂ -O- (CH ₂ J ₃ -, -CH ₂ -NR ⁵ - (CH ₂ ) ₃ -, -CH ₂ -CHR ⁵ - (CH ₂ ) ₃ -,

R ¹ , R ² :

Alkyl, such as Ci _-2 o alkyl, preferably Ci-β-alkyl, such as methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, sec-butyl, tert-butyl, n- Pentyl, isopentyl, sec-pentyl, neo-pentyl, 1,2-dimethylpropyl, n-hexyl, iso-hexyl, sec-hexyl, n-heptyl, iso-heptyl, n-octyl, iso-octyl, 2-ethylhexyl, more preferably Ci-4-alkyl, or

R ¹ and R ² together form a - (CH ₂ Jj-X- (CH ₂ Jk- group such as - (CH ₂ J ₃ -, - (CH ₂ J ₄ -, - (CH ₂ J ₅ -, - (CH ₂ J ₆ -, - (CH ₂ J ₇ -, - (CH ₂ JO- (CH ₂ J ₂ -, - (CH ₂ ) -NR ⁵ - (CH ₂ ) ₂ -, - (CH ₂ J-CHR ⁵ - (CH ₂ J ₂ -, - (CH ₂ J ₂ -O- (CH ₂ J ₂ -, - (CH ₂ J ₂ -NR ^S - (CH ₂ J ₂ -, - (CH ₂ ) ₂ -CHR ⁵ - (CH ₂ ) ₂ -, -CH ₂ -O-

(CH ₂ J ₃ -, -CH ₂ -NRs- (CH ₂ J ₃ -, -CH ₂ -CH R ⁵ - (CH ₂ ) ₃ -,

R ^5, R ^10:

Alkyl, preferably Ci _-4 -alkyl, such as methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso- butyl, sec-butyl and tert-butyl, preferably methyl and ethyl, particularly preferably methyl,

Alkylphenyl, preferably C _{_7-4} o-alkylphenyl, such as 2-methylphenyl, 3-methylphenyl, 4-methylphenyl, 2,4-dimethylphenyl, 2,5-dimethylphenyl, 2,6-dimethylphenyl, 3,4-dimethylphenyl, 3, 5-dimethylphenyl, 2-, 3-, 4-nonylphenyl, 2-, 3-, 4-decylphenyl,

2,3-, 2,4-, 2,5-, 3,4-, 3,5-dinonylphenyl, 2,3-, 2,4-, 2,5-, 3,4- and 3,5- Didecylphenyl, in particular C _7-2 o-alkylphenyl,

R ⁶ , R ⁷ , R ⁸ , R ⁹ : methyl or ethyl, preferably methyl,

R ¹¹ , R ¹² :

Alkyl, such as d- to _C2o-alkyl, cycloalkyl such as C ₃ - to Ci ₂ cycloalkyl, aryl, heteroaromatics ryl, aralkyl, such as C ₇ - to C ₂ o-aralkyl, and alkylaryl, such as C ₇ - to C ₂ O-AI ky I aryl, each as defined above, X:

CH ₂ , CHR ⁵ , oxygen (O), sulfur (S) or NR ⁵ , preferably CH ₂ and O,

Y: N (R ¹⁰ ) ₂ , preferably NH ₂ and N (CH ₃ ) ₂ ,

Hydroxy (OH),

C _2-2 O-AI kylaminoa I kyl, preferably C _2- i6-alkylaminoalkyl, such as methylaminomethyl, 2- methylaminoethyl, ethylaminomethyl, 2-ethylaminoethyl and 2- (iso-

Propylamino) ethyl,

C3- ₂ o-dialkylaminoalkyl, preferably C3-16 dialkylaminoalkyl such as dimethylamino methyl, 2-dimethylaminoethyl, 2-diethylaminoethyl, 2- (di-n-propylamino) ethyl and 2- (di-iso-propylamino) ethyl,

Z:

CH ₂ , CHR ⁵ , O, NR ⁵ or NCH ₂ CH ₂ OH,

j, I: an integer from 1 to 4 (1, 2, 3 or 4), preferably 2 and 3, particularly preferably 2,

k, m, q: an integer from 1 to 4 (1, 2, 3 or 4), preferably 2, 3 and 4, more preferably 2 and 3,

n: an integer from 1 to 30, preferably an integer from 1 to 8 (1, 2, 3, 4, 5, 6, 7 or 8), more preferably an integer from 1 to 6.

Alcohols are under the above conditions virtually all primary and secondary alcohols with aliphatic OH function. The alcohols can be straight-chain, branched or cyclic. Secondary alcohols are aminated as well as primary alcohols. The alcohols may also bear substituents or contain functional groups which are inert under the conditions of the hydrogenating amination, for example alkoxy, alkenyloxy, alkylamino or dialkylamino groups, or else optionally hydrogenated under the conditions of the hydrogenating amination, for example CC double - or triple bonds. If polyhydric alcohols are to be aminated, it is possible to obtain control of the reaction conditions in hand, preferably amino alcohols, cyclic amines or multiply aminated products. The amination of 1, 4-diols leads, depending on the choice of reaction conditions, to 1-amino-4-hydroxy, 1, 4-diamino compounds or to five-membered rings with one nitrogen atom (pyrrolidines).

The amination of 1, 6-diols leads depending on the choice of reaction conditions to 1-amino-6-hydroxy, 1, 6-diamino compounds or seven-membered rings with a nitrogen atom (hexamethyleneimines).

The amination of 1, 5-diols leads depending on the choice of reaction conditions to 1 - amino-5-hydroxy, 1, 5-diamino compounds or six-membered rings with a nitrogen atom (piperidines, 1, 5-di-piperidinyl-pentane ). Accordingly, diglycol (DEG) can be prepared by amination with NH 3 monoaminodiglycol (= ADG = H ₂ N-CH ₂ CH ₂ -O- CH ₂ CH ₂ -OH), diaminodiglycol (H ₂ N-CH ₂ CH ₂ -O-CH ₂ CH ₂ -NH ₂ ) or more preferably morpholine are obtained. From diethanolamine, piperazine is correspondingly obtained with particular preference. From triethanolamine, N- (2-hydroxyethyl) piperazine can be obtained.

For example, the following alcohols are preferably aminated:

Methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, n-pentanol, n-hexanol, 2-ethylhexanol, tridecanol, stearyl alcohol, palmityl alcohol, cyclobutanol, cyclopentanol, cyclohexanol, benzyl alcohol, 2-phenyl-ethanol, 2- (p-methoxyphenyl) ethanol, 2- (3,4-dimethoxyphenyl) ethanol, 1-phenyl-3-butanol, ethanolamine, n-propanolamine, isopropanolamine, 2-amino-1-propanol, 1-methoxy 2-propanol, 3-amino-2,2-dimethyl-1-propanol, n-pentanolamine (1-amino-5-pentanol), n-hexanolamine (1-amino-6-hexanol), ethanolamine, diethanolamine, triethanolamine , N-alkyldiethanolamines, diisopropanolamine, 3- (2-hydroxyethylamino) propan-1-ol, 2- (N, N-dimethylamino) ethanol, 2- (N, N-diethylamino) ethanol, 2- (N, N Di-n-propylamino) ethanol, 2- (N, N-di-iso-propylamino) ethanol, 2- (N, N-di-n-butylamino) ethanol, 2- (N, N-di-) iso-butylamino) ethanol, 2- (N, N-di-sec-butylamino) ethanol, 2- (N, N-di-tert.-butylamino) ethanol, 3- (N ₁ N-dimethylamino) propanol, 3 - (N, N-diethylamino) propanol, 3- (N, N-di-n-propylamino) propanol, 3- ( N, N-di-iso-propylamino) propanol, 3- (N, N-di-n-butylamino) propanol, 3- (N, N-diisobutylamino) propanol, 3- (N, N-di -sec.-butylamino) propanol, 3- (N ₁ N-di-tert-butylamino) propanol, 1-dimethylamino-pentanol-4, 1-diethylamino-pentanomial, ethylene glycol, 1, 2-propylene glycol, 1, 3- Propylene glycol, diglycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 2,2-bis [4-hydroxycyclohexyl] propane, methoxyethanol, propoxyethanol, butoxyethanol, polypropyl alcohols, polyethylene glycol ethers, polypropylene glycol ethers and polybutylene. The latter polyalkylene glycol ethers are converted in the reaction according to the invention by conversion of their free hydroxyl groups to the corresponding amines. Particularly preferred alcohols are methanol, ethanol, n-propanol, i-propanol, n-butanol, sec-butanol, 1, 4-butanediol, 1, 5-pentanediol, 1, 6-hexanediol, 2-ethylhexanol, cyclohexanol, fatty alcohols , Ethylene glycol, diethylene glycol (DEG), triethylene glycol (TEG), 2- (2-dimethylaminoethoxy) ethanol, N-methyldiethanolamine and 2- (2-dimethylaminoethoxy) ethanol.

Suitable ketones which can be used in the process according to the invention are suitable among the above-mentioned. Prerequisites practically all aliphatic and aromatic ketones. The aliphatic ketones may be straight-chain, branched or cyclic, the ketones may contain heteroatoms. The ketones may also bear substituents or contain functional groups which are inert under the conditions of the hydrogenating amination, for example alkoxy, alkenyloxy, alkylamino or dialkylamino groups, or else optionally hydrogenated under the conditions of the hydrogenating amination be CC double or triple bonds. If polyvalent ketones are to be aminated, it is possible to obtain control of the reaction conditions by hand, aminoketones, amino alcohols, cyclic amines or multiply aminated products.

For example, the following ketones are preferably hydrogenated aminatively:

Acetone, ethyl methyl ketone, methyl vinyl ketone, isobutyl methyl ketone, butanone, 3-methyl-butan-2-one, diethyl ketone, tetralone, acetophenone, p-methyl-acetophenone, p-methoxy-acetophenone, m-methoxy-acetophenone, 1-acetylnaphthalene, 2-acetylnaphthalene, 1-phenyl-3-butanone, cyclobutanone, cyclopentanone, cyclopentenone, cyclohexanone, cyclohexenone, 2,6-dimethylcyclohexanone, cycloheptanone, cyclododecanone, acetylacetone, methylglyoxal and benzophenone.

Suitable aldehydes for use in the process according to the invention are suitable among the above-mentioned. Prerequisites virtually all aliphatic and aromatic aldehydes. The aliphatic aldehydes may be straight-chain, branched or cyclic, the aldehydes may contain heteroatoms. The aldehydes may also bear substituents or contain functional groups which are inert under the conditions of the hydrogenating amination, for example alkoxy, alkenyloxy, alkylamino or dialkylamino groups, or else optionally hydrogenated under the conditions of the hydrogenating amination, for example CC -Double or triple bonds. If multivalent aldehydes or keto aldehydes are to be aminated, then it is possible to obtain control of the reaction conditions in hand, amino alcohols, cyclic amines or multiply aminated products.

For example, the following aldehydes are preferably hydrogenated aminatively: Formaldehyde, acetaldehyde, propionaldehyde, n-butyraldehyde, isobutyraldehyde, pivalin-aldehyde, n-pentanal, n-hexanal, 2-ethylhexanal, 2-methylpentanal, 3-methylpentanal, 4-methylpentanal, glyoxal, benzaldehyde, p-methoxybenzaldehyde, p- Methylbenzaldehyde, phenylacetaldehyde, (p-methoxyphenyl) acetaldehyde, (3,4-dimethoxyphenyl) acetaldehyde, 4-formyltetrahydropyran, 3-formyltetrahydrofuran, 5-formylvaleronitrile, citronellal, lysmeral, acrolein, methacrolein, ethylacrolein, citral, crotonaldehyde , 3-methoxypropionaldehyde, 3-aminopropionaldehyde, hydroxypivalaldehyde, dimethylolpropionaldehyde, dimethylolbutyraldehyde, furfural, glyoxal, glutaraldehyde, and hydroformylated oligomers and polymers, e.g. B. hydroformylated polyisobutene (polyisobutene) or obtained by metathesis of 1-pentene and cyclopentene and hydroformylated oligomer.

As aminating agents in the hydrogenating amination of alcohols, aldehydes or ketones in the presence of hydrogen, both ammonia and primary or secondary, aliphatic or cycloaliphatic or aromatic amines can be used.

When using ammonia as the aminating agent, the alcoholic hydroxyl group or the aldehyde group or the keto group is first converted into the primary amino groups (-NH 2). The primary amine formed in this way can react with further alcohol or aldehyde or ketone to form the corresponding secondary amine, which in turn reacts with further alcohol or aldehyde or ketone to form the corresponding, preferably symmetrical, tertiary amine. Depending on the composition of the reaction mixture or the reactant stream (in continuous operation) and depending on the reaction conditions used - pressure, temperature, reaction time

(Catalyst loading) - can be in this way, as desired, preferably primary, secondary or tertiary amines.

From polyhydric alcohols or di- or oligoaldehydes or di- or oligoketones or ketoaldehydes, in this way it is possible by intramolecular hydrogenating amination to prepare cyclic amines, such as e.g. Pyrrolidines, piperidines, hexamethylenimines, piperazines and morpholines.

Like ammonia, primary or secondary amines can be used as aminating agents.

These aminating agents are preferably used for the preparation of unsymmetrically substituted di- or trialkylamines, such as ethyldiisopropylamine and ethyldicyclohexylamine. For example, the following mono- and dialkylamines are used as aminating agents: monomethylamine, dimethylamine, monoethylamine, diethylamine, n-propylamine, di-n-propylamine, isopropylamine, diisopropylamine, isopropylethylamine, n-butylamine, Di-n-butylamine, s-butylamine, di-s-butylamine, iso-butylamine, n-pentylamine, s-pentylamine, iso-pentylamine, n-hexylamine, s-hexylamine, iso-hexylamine, cyclohexylamine, aniline, toluidine, piperidine, morpholine and pyrrolidine.

Amines particularly preferably prepared by the process according to the invention are, for example, morpholine (from monoaminodiglycol), monoaminodiglycol, morpholine and / or 2, 2'-dimorpholinodiethyl ether (DMDEE) (from DEG and ammonia), 6-dimethylaminohexanol-1 (from hexanediol and dimethylamine ( DMA)), triethylamine (from ethanol and diethylamine (DEA)), dimethylethylamine (from ethanol and DMA), N- (C 1-4 -alkyl) morpholine (from DEG and mono (C 1-4 -alkyl) amine), N- (Ci-4-alkyl) piperidine (from 1, 5-pentanediol and mono (Ci-4-alkyl) amine), piperazine and / or diethylenetriamine (DETA) (from N- (2-aminoethyl) ethanolamine (AEEA) and ammonia), N-methyl-piperazine (from diethanolamine and MMA), NN ^{'-Dimethylpiperazin} ((from N-methyl diethanolamine, and MMA), 1, 2-ethylenediamine EDA) and / or diethylene triamine (DETA) and / or PIP ( from monoethanolamine (MEOA) and ammonia), 2-ethylhexylamine and bis (2-ethylhexyl) amine (from 2-ethylhexanol and NH3), tridecylamine and bis (tridecyl) amine (from tridecanol and NH3), n-octylamine (from nO canol and NH3), 1,2-propylenediamine (from 2-hydroxypropylamine and NH3), 1-diethylamino-4-aminopentane (from 1-diethylamino-4-hydroxypentane and NH3), N, N-di (Ci 4-alkyl) cyclohexylamine (from cyclohexanone and / or cyclohexanol and di (C 1-4 -alkyl) amine), for example N, N-dimethyl-N-cyclohexylamine (DMCHA), polyisobuteneamine (PIBA; with eg n ~ 1000) (from polyisobutene-dehyde and NH3), N, N-diisopropyl-N-ethylamine (Hünigbase) (from N, N-diisopropylamine and acetaldehyde), N-methyl-N-isopropylamine (MMIPA) (from Monomethylamine and acetone), n-propylamines (such as mono- / di-n-propylamine, N, N-dimethyl-Nn-propylamine (DMPA)) (from propionaldehyde and / or n-propanol and NH ₃ or DMA, respectively), N ₁ N-dimethyl-N-isopropylamine (DMIPA) (from i-propanol and / or acetone and DMA),

N, N-dimethyl-N-butylamine (1-, 2- or iso-butanol and / or butanal, i-butanal or butanone and DMA), 2- (2-di (Ci-4-alkyl) aminoethoxy) ethanol and or bis (2-di (C 1-4 -alkyl) aminoethyl) ether (from DEG and di (C 1-4 -alkyl) amine), 1, 2-ethylenediamine (EDA), monoethanolamine (MEOA), diethylenetriamine (DETA) and / or piperazine (PIP) (from monoethylene glycol (MEG) and ammonia), 1, 8-diamino-3,6-dioxa-octane and / or 1-amino-8-hydroxy-3,6-dioxa-octane (from Triethylene glycol (TEG) and ammonia), 1-methoxy-2-propylamine (1-methoxy-isopropylamine, MOIPA) (from 1-methoxy-2-propanol and ammonia), N-cyclododecyl-2,6-dimethylmorpholine (dodemorph) ( from cyclododecanone and / or cyclododecanol and 2,6-dimethylmorpholine), polyetheramine (from corresponding polyether alcohol and ammonia). The polyether alcohols are, for example, polyethylene glycols or polypropylene glycols having a molecular weight in the range from 200 to 5000 g / mol, the corresponding polyetheramines being obtainable, for example, under the trade name PEA D230, D400, D2000, T403 or T5000 from BASF. Examples

Example 1 Preparation of Amination Catalyst 1 (Based on Ni-Co-Cu / ZrO 2 = Comparative Experiment According to EP-A-963 975)

An aqueous solution of nickel nitrate, cobalt nitrate, copper nitrate and zirconium acetate containing 2.39 wt% NiO, 2.39 wt% CoO, 0.94 wt% CuO and 2.82 wt% ZrO ₂ , Was simultaneously precipitated in a stirred vessel in a constant stream with a 20% aqueous sodium carbonate solution at a temperature of 70 ° C so that the measured with a glass electrode pH of 7.0 was maintained. The suspension obtained was filtered and the filter cake was washed with demineralized water until the electrical conductivity of the filtrate was about 20 μS. Thereafter, the filter cake was dried at a temperature of 150 ° C in a drying oven or a spray dryer. The thus obtained hydroxide-carbonate mixture was then tempered at a temperature of 450 to 500 ° C over a period of 4 hours. The catalyst thus prepared had the composition: 28% by weight of NiO, 28% by weight of CoO, 11% by weight of CuO, and 33% by weight of ZrO ₂ . The catalyst was mixed with 3% by weight of graphite and formed into tablets. The oxidic tablets were reduced. The reduction was carried out at 280 ° C, the heating rate being 3 ° C / minute. First, it was reduced for 50 minutes with 10% H ₂ in N ₂ , then 20 minutes with 25% H ₂ in N ₂ , then 10 minutes with 50% H ₂ in N ₂ , then 10 minutes with 75% H ₂ in N ₂ and finally 3 hours with 100% H ₂ . The percentages are% by volume. The passivation of the reduced catalyst was carried out at room temperature in dilute air (air in N ₂ with an O ₂ content of not more than 5% by volume).

Example 2

The catalyst was prepared analogously to catalyst 1. However, silver nitrate was added to the nitrate solution shortly before precipitation. The catalyst 2 thus obtained had the composition as shown in Table I.

Example 3

Amination of diethylene glycol (DEG)

8 g of the reduced amination catalyst in the form of about 1 mm grit was placed in a 300 ml autoclave together with 80 g of diethylene glycol (0.75 mol). To the reaction mixture was added 34 g of liquid ammonia (2 mol), the autoclave was pressurized to 70 bar with hydrogen and heated to 200 ° C. At 200 ° C again 20 bar of hydrogen was injected, the total pressure rose to 180 - 200 bar. The autoclave was run at 200 ° C for 12 hours with stirring.

At various times, samples were withdrawn from the reaction mixture and analyzed by GC chromatography. For this purpose, a 30 m long GC column "RTX-5 Amines" was used, with a temperature program: 80 ° C / 15 minutes, heating to 290 ° C in 30 minutes, at 290 ° C / 15 minutes.

The composition of the resulting reaction mixtures for the catalysts of Examples 1 and 2 is shown in Table I.

Table I:

Catalyst * Performance

Decarbony-

DEG decarbony lation

Ni Co Cu Dot. Dot. Time sales Mor ADG MeOEt MeOAE lation Normalized ^**

#%%%% Hours GC% GC% GC% GC% GC% Σ GC%%

4 64.3 31, 0 21, 7 0.40 0.15 0.60 0.94%

1 21, 9 21, 9 10.5 - - 8 83.8 53, 6 12.6 0.30 0.31 0.73 0.87%

12 94.9 69, 6 4.5 0.19 0.40 0.82 0.86%

4 67.6 29, 9 28.4 0.16 0.08 0.33 0.48%

2 19, 0 19.0 9.9 Ag 1, 9 8 76.2 40, 8 23.6 0.15 0.10 0.33 0.43%

12 91, 1 63, 8 12.1 0.12 0.16 0.42 0.47%

^* Catalyst composition in wt%; Remainder up to 100% is ZrO2 * ^* total decarbonylation / DEG conversion DEG diethylene glycol Mor morpholine ADG aminodiglycol MeOEt methoxyethanol MeOAE methoxyethylamine

Decarbonylation sum of methanol, methoxyethanol, methoxyethylamine N-methylmorpholine and methoxy-ethyl-morpholine

Work-up:

The respective pure products can be obtained from the hydrous raw materials by rectification under vacuum, atmospheric pressure or elevated pressure according to the known methods. The pure products fall either directly in pure form or as an azeotrope with water. Water-containing azeotropes can be dehydrated by means of a liquid-liquid extraction with concentrated sodium hydroxide solution before or after the purifying distillation. Distillative dewatering in the presence of an entraining agent according to known methods is also possible.

In the event that the raw material or the aliphatic amine in the raw material are hardly or not miscible with water, a dehydration by a separation of the organic and the aqueous phase by known methods is also possible.

Claims

claims

A process for preparing an amine by reacting a primary or secondary alcohol, aldehyde and / or ketone with hydrogen and a nitrogen compound selected from the group consisting of ammonia, primary and secondary amines, in the presence of a zirconia and nickel containing catalyst, characterized in that the catalytically active material of the catalyst, prior to its reduction with hydrogen, contains oxygen-containing compounds of zirconium, copper, nickel and cobalt and in the range of from 0.5 to 6% by weight of oxygen-containing compounds of silver, calculated as AgO.

2. The method according to claim 1, characterized in that the catalytically active composition of the catalyst prior to its reduction with hydrogen in the range of 1, 0 to 4 wt .-% oxygen-containing compounds of silver, calculated as

AgO, contains.

3. The method according to claim 1, characterized in that the catalytically active composition of the catalyst prior to its reduction with hydrogen in the range of 1, 3 to 3 wt .-% oxygen-containing compounds of silver, calculated as

AgO, contains.

4. The method according to any one of the preceding claims, characterized in that the catalytically active composition of the catalyst prior to its reduction with hydrogen in the range of

From 10 to 75% by weight of oxygen-containing compounds of zirconium, calculated as

ZrO ₂ ,

From 1 to 30% by weight of oxygen-containing compounds of copper, calculated as

CuO, 10 to 50 wt .-% oxygen-containing compounds of nickel, calculated as

NiO, and

10 to 50% by weight of oxygen-containing compounds of cobalt, calculated as

CoO, contains.

5. The method according to any one of claims 1 to 3, characterized in that the catalytically active material of the catalyst prior to its reduction with hydrogen in the range of

From 25 to 65% by weight of oxygen-containing compounds of zirconium, calculated as

ZrO ₂ , 2 to 25 wt .-% oxygenated compounds of copper, calculated as

CuO,

From 13 to 40% by weight of oxygen-containing compounds of nickel, calculated as NiO, and

13 to 40 wt .-% oxygen-containing compounds of cobalt, calculated as

CoO, contains.

6. The method according to any one of claims 1 to 3, characterized in that the catalytically active material of the catalyst prior to its reduction with hydrogen in the range of

30 to 55 wt .-% oxygenated compounds of zirconium, calculated as

ZrO ₂ , 5 to 15 wt .-% oxygen-containing compounds of copper, calculated as

CuO,

16 to 35 wt .-% oxygenated compounds of nickel, calculated as

NiO, and

16 to 35 wt .-% oxygen-containing compounds of cobalt, calculated as CoO contains.

7. The method according to any one of the preceding claims, characterized in that the molar ratio of nickel to copper is greater than 1 in the catalyst.

8. The method according to any one of the preceding claims, characterized in that one carries out the reaction at a temperature in the range of 80 to 350 ° C.

9. The method according to any one of the preceding claims, characterized in that one carries out the reaction in the liquid phase at an absolute pressure in the range of 5 to 30 MPa or in the gas phase at an absolute pressure in the range of 0.1 to 40 MPa.

10. The method according to any one of the preceding claims, characterized in that the amine component (nitrogen compound) in the 0.90 to 100-fold molar amount based on the / used alcohol, aldehyde and / or ketone is used.

1 1. A method according to any one of claims 1 to 9, characterized in that the amine component (nitrogen compound) in the 1, 0 to 10-fold molar amount based on the / used alcohol, aldehyde and / or ketone is used ,

12. The method according to any one of the preceding claims, characterized in that the catalyst is arranged in the reactor as a fixed bed.

13. The method according to any one of the preceding claims, characterized in that it is carried out continuously.

14. The method according to the preceding claim, characterized in that the reaction takes place in a tubular reactor.

15. The method according to one of the two preceding claims, characterized in that the reaction takes place in a cycle gas mode.

16. The method according to any one of the preceding claims, characterized in that one uses the alcohol, aldehyde and / or ketone as an aqueous solution.

17. The method according to any one of the preceding claims, characterized in that one uses the ammonia, the primary or secondary amine as an aqueous solution.

18. The method according to any one of the preceding claims for the preparation of monoaminodiglycol (ADG) and morpholine by reaction of diethylene glycol (DEG) with ammonia.

19. The method according to any one of claims 1 to 17 for the preparation of N- (Ci-4-alkyl) - morpholine by reaction of diethylene glycol (DEG) with mono (Ci-4-alkyl) amine.

20. The method according to any one of claims 1 to 17 for the preparation of 2- (2-di (Ci _-4 - alkyl) aminoethoxy) ethanol and / or bis (2-di (Ci-4-alkyl) aminoethyl) ether by reaction of Diethylene glycol (DEG) with di (Ci-4-alkyl) amine.

21. The method according to any one of claims 1 to 17 for the preparation of monoethanolamine (MEOA) and / or 1, 2-ethylenediamine (EDA) by reaction of mono ethylene glycol (MEG) with ammonia.

22. The method according to any one of claims 1 to 17 for the preparation of 1, 2-ethylene diamine (EDA) by reacting monoethanolamine (MEOA) with ammonia.

23. The method according to any one of claims 1 to 17 for the preparation of a Polyethera- minutes by reacting a corresponding polyether alcohol with ammonia.

24. The method according to any one of claims 1 to 17 for the preparation of piperazine and / or diethylenetriamine (DETA) by reacting N- (2-aminoethyl) - ethanolamine (AEEA) with ammonia.

25. The method according to any one of claims 1 to 17 for the preparation of polyisobutene amine (PIBA) by reacting polyisobutene aldehyde with ammonia and hydrogen.

26. A catalyst as defined in any one of claims 1 to 7.